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參數資料
| 型號： | SA626 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Low voltage high performance mixer FM IF system with high-speed RSSI |
| 中文描述： | 低電壓高性能混頻器IF系統(tǒng)與調頻高速的RSSI |
| 文件頁數： | 4/16頁 |
| 文件大?。?/td> | 231K |
| 代理商： | SA626 |
Philips Semiconductors
Product specification
SA626
Low voltage high performance mixer FM IF system
with high-speed RSSI
1997 Sept 25
4
AC ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C; V
CC
= +3V, unless otherwise stated. RF frequency = 240.05MHz + 14.5dBV RF input step-up; IF frequency = 10.7MHz; RF level =
-68dBm; FM modulation = 1kHz with
±
125kHz peak deviation. Audio output with C-message weighted filter and de-emphasis filter. Test circuit
Figure 1. The parameters listed below are tested using automatic test equipment to assure consistent electrical characteristics. The limits do
not represent the ultimate performance limits of the device. Use of an optimized RF layout will improve many of the listed parameters.
LIMITS
SA626
TYP
SYMBOL
PARAMETER
TEST CONDITIONS
UNITS
MIN
MAX
Mixer/Osc section (ext LO = 160mV
RMS
)
f
IN
Input signal frequency
f
OSC
External oscillator (buffer)
Noise figure at 240MHz
Third-order input intercept point
Conversion power gain
RF input resistance
RF input capacitance
Mixer output resistance
IF section
IF amp power gain
Limiter amp power gain
Input limiting -3dB
AM rejection
Audio level
Audio DC level
SINAD sensitivity
THD
Total harmonic distortion
S/N
Signal-to-noise ratio
IF RSSI output with buffer
500
500
14
-16
11
700
3.5
330
MHz
MHz
dB
dBm
dB
pF
Matched f1=240.05; f2=240.35MHz
Matched 14.5dBV step-up
Single-ended input
8
14
(Pin 20)
38
54
–105
50
160
1.0
16
-43
60
0.2
0.6
1.3
dB
dB
dBm
dB
mV
RMS
V
dB
dB
dB
V
V
V
Test at Pin 18
80% AM 1kHz
Unity gain
Pin 9, no signal
IF level = -111dBm
120
200
–38
No modulation for noise
IF level = -118dBm
IF level = -68dBm
IF level = -10dBm
IF frequency = 10.7MHz
RF level = -56dBm
RF level = -28dBm
IF frequency = 10.7MHz
RF level = -56dBm
RF level = -28dBm
0.5
1.0
1.8
0.3
0.9
IF RSSI output rise time
(10kHz pulse, no 10.7MHz filter)
(no RSSI bypass capacitor)
IF RSSI output fall time
(10kHz pulse, no 10.7MHz filter)
(no RSSI bypass capacitor)
RSSI range
RSSI accuracy
IF input impedance
IF output impedance
Limiter input impedance
Limiter output impedance
Limiter output level with no load
RF/IF section (int LO)
Audio level
System RSSI output
System SINAD
1.2
1.1
μ
s
μ
s
2.0
7.3
90
+1.5
330
330
330
300
130
μ
s
μ
s
dB
dB
mV
RMS
RF level = -10dBm
RF level = -10dBm
RF level = -106dBm
160
1.4
12
mV
RMS
V
dB
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